@width:75rem;
.fenlei_div{
    position: fixed;
    top: 88/@width;
    bottom: 98/@width;
    overflow: hidden;
    ul{
        li{
            display: inline-block;
            font-size: 25/@width;
            a{
               display: inline-block;
                padding:15/@width 47/@width;
                margin: 20/@width;
                border: 1px solid #999;
                border-radius: 20/@width;
                background: #f5f5f5;
                color: #222;
            }
            .active{
                background: #ff0000;
                color: white;
            }
        }
    }
}